1222121222010 has 96 divisors (see below), whose sum is σ = 3425800210560. Its totient is φ = 300490429824.

The previous prime is 1222121221949. The next prime is 1222121222017. The reversal of 1222121222010 is 102221212221.

It is a happy number.

1222121222010 is a `hidden beast` number, since 1 + 2 + 221 + 212 + 220 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1222121222017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 448981 + ... + 1626599.

It is an arithmetic number, because the mean of its divisors is an integer number (35685418860).

Almost surely, 2^{1222121222010} is an apocalyptic number.

1222121222010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222121222010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712900105280).

1222121222010 is an abundant number, since it is smaller than the sum of its proper divisors (2203678988550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222121222010 is a wasteful number, since it uses less digits than its factorization.

1222121222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178532 (or 1178529 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1222121222010 its reverse (102221212221), we get a palindrome (1324342434231).

The spelling of 1222121222010 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, ten".